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When I flush my G8441 (installed is 42.2.A.2.33) with 47.2.A.11.228 or 47.2.A.11.107 it will done after 8 or 9 seconds:
Preparing service...
...service successfully prepared.
Sending data to the device...
...data sent successfully.
Finalizing service. Please allow up to 10 minutes for this step...
...successfully finalized.
Service execution completed in 9 seconds
Success
And, how wonders, 2.33 is still active, of course.